Town Trip

Yes patience was needed but very straightforward gameplay.

Long is right - all the trial and error is starting to take a toll. While I'm making a comment - are trick used?

After all the trial and errors were worked out, then the level was fairly easy to execute. I did use one trick,

Spoiler: Trick

claustrophobia

a few times. After the detailed beginning, the ending seemed a little soft but that's okay as I'd still be trying to figure that section out. Thanks for sharing.

Great level...Great design and very fun path...Thanks for sharing @Tadashi Suzuki

Good idea!

The long path and various tricky steps have the effect that solving the puzzle is very time-consuming. In retrospect, the puzzle is very enjoyable.

Took me a while to...

Spoiler

find the passing lane.

After that, the gameplay was clear enough. I liked the design on this one.

A number of traps, a lot of back and forth (unless there's a more efficient order than what I did), a lot of herding, but an enjoyable puzzle. Good-looking design. Thank you!

Like some of your other puzzles, R has a pillar head

Spoiler: Reason

not for B to mount, but rather to push balls too high for B.

Here's a video walkthrough:

Spoiler: Video Solution